Construction System and Construction Method of Double-direction Gantry Crane on Dam Crest

Abstract

The present application discloses a construction system for a two-way portal crane on the dam crest, including a lower crossbeam structure; a portal leg structure arranged on the lower crossbeam structure, and the portal leg structure includes a first portal leg, a second portal leg, a third portal leg and a fourth portal leg; a middle crossbeam structure, which includes a first middle crossbeam assembly and a second middle crossbeam assembly, the first middle crossbeam assembly is arranged between the first portal leg and the second portal leg, and the second middle crossbeam assembly is arranged between the third portal leg and the fourth portal leg; a support rod, which is used to fix the middle crossbeam structure when the portal leg structure and the middle crossbeam structure are connected; a guy wire, which is used to fix the portal leg structure; a crane, which is used to hoist the portal leg structure, the middle crossbeam structure, the support rod and the guy wire; and a construction method of the construction system. The present application provides a construction system for a two-way portal crane on the dam crest and its construction method, aiming to solve the problem that the portal legs of the portal crane in the prior art are extremely prone to local deformation, resulting in a high difficulty in installing the crossbeam.

Description

Technical Field

[0001] This application relates to the field of water conservancy projects, and particularly to a construction system and a construction method for a double-direction portal crane on the dam crest. Background Art

[0002] During the construction of a double-direction portal crane on the dam crest, the portal legs of the double-direction portal crane on the dam crest are of variable cross-section box structures. After the portal legs are installed, they form an angle of 4.7 degrees with the vertical direction. Due to the eccentric action caused by the self-weight of the portal legs, local deformation will inevitably occur at the top of the portal legs, which not only may cause problems such as fractures inside the double-direction portal crane on the dam crest, thus affecting the normal use of the double-direction portal crane on the dam crest, but also increases the installation difficulty of the cross beam.

[0003] Therefore, it is necessary to design a construction system and a construction method for a double-direction portal crane on the dam crest to solve the above problems. Summary of the Invention

[0004] The main purpose of this application is to provide a construction system and a construction method for a double-direction portal crane on the dam crest, aiming to solve the problem in the prior art that the portal legs of the double-direction portal crane on the dam crest are extremely prone to local deformation, resulting in a relatively high installation difficulty of the cross beam.

[0005] To achieve the above purpose, this application proposes a construction system for a double-direction portal crane on the dam crest. The construction system for the double-direction portal crane on the dam crest includes:

[0006] Lower cross beam structure;

[0007] Portal leg structure, arranged on the lower cross beam structure. The portal leg structure includes a first portal leg, a second portal leg, a third portal leg and a fourth portal leg;

[0008] Middle cross beam structure. The middle cross beam structure includes a first middle cross beam assembly and a second middle cross beam assembly. The first middle cross beam assembly is arranged between the first portal leg and the second portal leg, and the second middle cross beam assembly is arranged between the third portal leg and the fourth portal leg;

[0009] Supporting rod, which is used to fix the middle cross beam structure when the portal leg structure and the middle cross beam structure are connected;

[0010] Guy wire, which is used to fix the portal leg structure;

[0011] Crane, which is used to hoist the portal leg structure, the middle cross beam structure, the supporting rod and the guy wire.

[0012] Optionally, the first middle cross beam assembly includes at least two middle cross beams;

[0013] The second middle cross beam assembly includes at least two middle cross beams;

[0014] The construction system of the double-direction gantry crane on the dam crest further includes:

[0015] A Bailey truss construction member, one end of which is connected to the first middle crossbeam assembly and the other end is connected to the second middle crossbeam assembly;

[0016] The lower crossbeam structure includes a first lower crossbeam and a second lower crossbeam;

[0017] The first lower crossbeam is arranged parallel to the extension line of the dam;

[0018] The second lower crossbeam is arranged parallel to the extension line of the dam;

[0019] One end of the first lower crossbeam is connected to the bottom of the first portal leg and the other end is connected to the bottom of the second portal leg;

[0020] One end of the second lower crossbeam is connected to the bottom of the third portal leg and the other end is connected to the bottom of the fourth portal leg.

[0021] Optionally, the construction system of the double-direction gantry crane on the dam crest further includes:

[0022] A trolley travel mechanism, which includes a first driving wheel set, a second driving wheel set, a third driving wheel set and a fourth driving wheel set;

[0023] One end of the first lower crossbeam is connected to the top of the first driving wheel set and the other end is connected to the top of the second driving wheel set;

[0024] One end of the second lower crossbeam is connected to the top of the third driving wheel set and the other end is connected to the top of the fourth driving wheel set.

[0025] Optionally, the construction system of the double-direction gantry crane on the dam crest further includes:

[0026] A main beam structure, which includes a first main beam and a second main beam. The first main beam is arranged at the top of the connection between the first portal leg and the third portal leg, and the second main beam is arranged at the top of the connection between the second portal leg and the fourth portal leg;

[0027] An end crossbeam assembly, one end of which is connected to the first main beam and the other end is connected to the second main beam;

[0028] The end crossbeam assembly includes a first end crossbeam and a second end crossbeam. The first end crossbeam is arranged at the top of the connection between the first portal leg and the second portal leg, and the second end crossbeam is arranged at the top of the connection between the third portal leg and the fourth portal leg.

[0029] Optionally, one side bank connected to the dam is the first side, and the other side bank is the second side.

[0030] The first portal leg is arranged on the first side of the upstream side of the dam.

[0031] The second portal leg is arranged on the second side of the upstream side of the dam.

[0032] The third portal leg is arranged on the first side of the downstream side of the dam.

[0033] The fourth portal leg is arranged on the second side of the downstream side of the dam.

[0034] To achieve the above object, the present application also proposes a manufacturing method of a construction system of a double-direction gantry crane on the dam top. The construction method includes:

[0035] Install the portal leg structure on the lower crossbeam structure, and arrange the middle crossbeam structure between the portal leg structures.

[0036] Optionally, the step of installing the portal leg structure on the lower crossbeam structure and arranging the middle crossbeam structure between the portal leg structures includes:

[0037] Fix the first portal leg at one end of the first lower crossbeam, and arrange guy ropes around the first portal leg.

[0038] Connect one end of the first middle crossbeam assembly to the support rod, and after supporting by the support rod, connect the other end of the first middle crossbeam assembly to the first portal leg.

[0039] After fixing the second portal leg at the other end of the first lower crossbeam, connect the end of the first middle crossbeam assembly connected to the support rod to the second portal leg.

[0040] Fix the third portal leg at one end of the second lower crossbeam, and arrange guy ropes around the third portal leg.

[0041] Connect one end of the second middle crossbeam assembly to the support rod, and after supporting by the support rod, connect the other end of the second middle crossbeam assembly to the third portal leg.

[0042] After fixing the fourth portal leg at the other end of the second lower crossbeam, connect the end of the second middle crossbeam assembly connected to the support rod to the fourth portal leg.

[0043] Connect one end of the Bailey truss construction member to the first middle crossbeam assembly, and connect the other end of the Bailey truss construction member to the second middle crossbeam assembly to form a stable framework.

[0044] Optionally, before the step of installing the portal leg structure on the lower crossbeam structure and arranging the middle crossbeam structure between the portal leg structures, the construction method includes:

[0045] Measure and lay out the center points of the four driving wheel sets, and install the gantry traveling mechanism at the center points;

[0046] Position by using the shear plates at the bottom of the first lower crossbeam, and connect the first lower crossbeam with the gantry traveling mechanism;

[0047] Position by using the shear plates at the bottom of the second lower crossbeam, and connect the second lower crossbeam with the gantry traveling mechanism;

[0048] Install the two ends of the Bailey truss members on the first lower crossbeam and the second lower crossbeam respectively for auxiliary fixation.

[0049] Optionally, after the step of installing the portal leg structure on the lower crossbeam structure and arranging the middle crossbeam structure between the portal leg structures, the construction method includes:

[0050] Weld the first main beam at the top of the joint of the first portal leg and the third portal leg;

[0051] Weld the second main beam at the top of the joint of the second portal leg and the fourth portal leg;

[0052] Install the end crossbeam assembly between the first main beam and the second main beam.

[0053] Optionally, the construction system of the double-way gantry crane on the dam crest further includes a plurality of positioning grooves, and each positioning groove is respectively arranged at the joint of each main beam and each portal leg;

[0054] The step of installing the end crossbeam assembly between the first main beam and the second main beam includes:

[0055] Set the first end crossbeam at the top of the joint of the first portal leg and the second portal leg;

[0056] Set the second end crossbeam at the top of the joint of the third portal leg and the fourth portal leg;

[0057] Use the positioning grooves to position the first end crossbeam and / or the second end crossbeam;

[0058] Use a jack to finely adjust the positions of the first end crossbeam and / or the second end crossbeam.

[0059] In the technical solution proposed in this application, when the gantry leg structure and the middle crossbeam structure are connected, the middle crossbeam structure is supported by the support rod, and the gantry foot structure is fixed by the guy wire, thereby reducing the eccentric effect caused by the self-weight of the gantry leg, avoiding local deformation of the gantry foot, and improving the reliability of the construction system of the double-direction gantry crane on the dam top. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0061] Figure 1 It is a hoisting schematic diagram of the trolley running mechanism of the construction system of the double-direction gantry crane on the dam top of this application;

[0062] Figure 2 It is a reinforcement schematic diagram of the lower crossbeam of the construction system of the double-direction gantry crane on the dam top of this application;

[0063] Figure 3 It is a hoisting schematic diagram of the gantry leg of the construction system of the double-direction gantry crane on the dam top of this application;

[0064] Figure 4 It is a reinforcement schematic diagram of the gantry leg of the construction system of the double-direction gantry crane on the dam top of this application;

[0065] Figure 5 It is the first side view of the hoisting of the main girder of the construction system of the double-direction gantry crane on the dam top of this application;

[0066] Figure 6 It is the first side view of the installation of the trolley running of the construction system of the double-direction gantry crane on the dam top of this application;

[0067] Figure 7 It is the upstream side view of the construction system of the double-direction gantry crane on the dam top of this application;

[0068] Figure 8 It is the downstream side view of the construction system of the double-direction gantry crane on the dam top of this application;

[0069] Figure 9 It is a schematic diagram of the wire rope winding method of the main hoisting mechanism of the construction method of the double-direction gantry crane on the dam top of this application;

[0070] Figure 10 It is a schematic diagram of the wire rope winding method of the auxiliary hoisting mechanism of the construction method of the double-direction gantry crane on the dam top of this application;

[0071] Figure 11 It is a flowchart of the construction method of the double-direction gantry crane on the dam top of this application.

[0072] Description of the reference numerals in the drawings:

[0073] Label Name Label Name 11 First driving wheel set 12 Second driving wheel set 13 Third driving wheel set 21 First lower cross beam 22 Second lower cross beam 31 First door leg 32 Second door leg 33 Third door leg 34 Fourth door leg 41 First main beam 42 Second main beam 51 First end cross beam 52 Second end cross beam 60 Trolley 70 Crane 80 Bailey truss construction component 91 Cable 92 Drum 93 Pulley block 101 First middle cross beam assembly 102 Second middle cross beam assembly

[0074] The realization, functional features and advantages of the object of the present invention will be further described in conjunction with the embodiments and with reference to the accompanying drawings. Specific embodiments

[0075] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the embodiments of the present invention.

[0076] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0077] In addition, in the embodiments of the present invention, descriptions such as "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the embodiments of the present invention, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0078] In the embodiments of the present invention, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the internal connection of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0079] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the embodiments of the present invention.

[0080] This application provides a construction system for a two-way portal crane on the dam crest.

[0081] Please refer to Figure 1 , the construction system of the two-way portal crane on the dam crest includes:

[0082] The portal leg structure, which includes a first portal leg 31, a second portal leg, a third portal leg 33 and a fourth portal leg.

[0083] The middle crossbeam structure, which includes a first middle crossbeam assembly and a second middle crossbeam assembly. The first middle crossbeam assembly is arranged between the first portal leg 31 and the second portal leg, and the second middle crossbeam assembly is arranged between the third portal leg 33 and the fourth portal leg 34.

[0084] The support rod is used to fix the middle crossbeam structure when connecting the portal leg structure and the middle crossbeam structure; specifically, one end of the support rod is connected to the first middle crossbeam assembly, and the other end is connected to the ground or other fixed objects, so as to achieve the technical effect of fixing the first middle crossbeam assembly when connecting the portal leg structure and the first middle crossbeam assembly.

[0085] The guy wire is used to fix the portal leg structure;

[0086] The crane 70 is used to hoist the portal leg structure, the middle crossbeam structure, the support rod and the guy wire.

[0087] In the technical solution proposed by this application, when connecting the portal leg structure and the middle crossbeam structure, the middle crossbeam structure is supported by the support rod, and the portal leg structure is fixed by the guy wire, so as to reduce the eccentric effect caused by the self-weight of the portal leg, avoid local deformation of the portal foot, and improve the reliability of the construction system of the two-way portal crane on the dam crest.

[0088] Further, please refer to Figure 4 , the construction system of the two-way portal crane on the dam crest further includes:

[0089] The lower crossbeam structure, which includes a first lower crossbeam 21 and a second lower crossbeam 22;

[0090] The first lower crossbeam 21 is arranged parallel to the extension line of the dam;

[0091] The second lower crossbeam 22 is arranged parallel to the extension line of the dam;

[0092] One end of the first lower crossbeam 21 is connected to the bottom of the first portal leg 31, and the other end is connected to the bottom of the second portal leg;

[0093] One end of the second lower crossbeam 22 is connected to the bottom of the third portal leg 33, and the other end is connected to the bottom of the fourth portal leg.

[0094] The first middle crossbeam assembly includes at least two middle crossbeams, that is, the two middle crossbeams in the first middle crossbeam assembly are respectively arranged up and down between the first portal leg 31 and the second portal leg 32.

[0095] The second middle crossbeam assembly includes at least two middle crossbeams, that is, the two middle crossbeams in the second middle crossbeam assembly are respectively arranged up and down between the third portal leg 33 and the fourth portal leg 34.

[0096] The Bailey truss construction member 80, one end of the Bailey truss construction member 80 is connected to the first middle crossbeam assembly, and the other end is connected to the second middle crossbeam assembly. Specifically, the Bailey truss construction member installation tool is composed of two-span Bailey truss construction members, and the two-span Bailey trusses are arranged in parallel. After installing the first lower crossbeam and the second lower crossbeam, the Bailey truss construction member is installed, wherein one end of the Bailey truss construction member installation tool is connected to the first lower crossbeam, and the other end is connected to the second lower crossbeam.

[0097] Further, please refer to Figure 1 , Figure 2 , Figure 3 , the construction system of the double-direction gantry crane on the dam crest further includes:

[0098] The trolley traveling mechanism, the trolley traveling mechanism includes the first driving wheel set 11, the second driving wheel set 12, the third driving wheel set and the fourth driving wheel set;

[0099] One end of the first lower crossbeam 21 is connected to the top of the first driving wheel set 11, and the other end is connected to the top of the second driving wheel set 12;

[0100] One end of the second lower crossbeam 22 is connected to the top of the third driving wheel set, and the other end is connected to the top of the fourth driving wheel set.

[0101] Further, please refer to Figures 4 - 8 , the construction system of the double-direction gantry crane on the dam crest further includes:

[0102] The main beam structure, the main beam structure includes the first main beam 41 and the second main beam 42, the first main beam 41 is arranged at the top of the connection between the first portal leg 31 and the third portal leg 33, and the second main beam 42 is arranged at the top of the connection between the second portal leg 32 and the fourth portal leg;

[0103] The end crossbeam assembly, one end of the end crossbeam assembly is connected to the first main beam 41, and the other end is connected to the second main beam 42;

[0104] The end crossbeam assembly includes a first end crossbeam 51 and a second end crossbeam 52. The first end crossbeam 51 is arranged at the top of the connection between the first portal leg 31 and the second portal leg 32, and the second end crossbeam 52 is arranged at the top of the connection between the third portal leg 33 and the fourth portal leg 34.

[0105] Further, one side of the bank connected to the dam is the first side, and the other side of the bank is the second side.

[0106] The first portal leg 31 is arranged on the first side of the upstream side of the dam.

[0107] The second portal leg 32 is arranged on the second side of the upstream side of the dam.

[0108] The third portal leg 33 is arranged on the first side of the downstream side of the dam.

[0109] The fourth portal leg 34 is arranged on the second side of the downstream side of the dam.

[0110] In the technical solution proposed in this application, the shapes and masses of the first portal leg 31, the second portal leg 32, the third portal leg 33 and the fourth portal leg 34 are the same. The first portal leg 31 and the third portal leg 33 are on the same side, generally arranged on the right side of the dam, and the second portal leg 32 and the fourth portal leg 34 are on the same side, generally arranged on the left side of the dam.

[0111] Please refer to Figure 9 , this application provides a construction method of a construction system for a double-direction gantry crane on the dam crest, including:

[0112] Install the portal leg structure on the lower crossbeam structure, and set the middle crossbeam structure between the portal leg structures.

[0113] Further, the step of installing the portal leg structure on the lower crossbeam structure and setting the middle crossbeam structure between the portal leg structures includes:

[0114] Fix the first portal leg 31 at one end of the first lower crossbeam, and arrange the guy ropes around the first portal leg 31;

[0115] Fix the first portal leg at one end of the first lower crossbeam, and arrange the guy ropes around the first portal leg 31;

[0116] Connect one end of the first middle crossbeam assembly 101 to the support rod, and after supporting by the support rod, connect the other end of the first middle crossbeam assembly 101 to the first portal leg 31;

[0117] After fixing the second portal leg 32 at the other end of the first lower crossbeam, connect the end of the first middle crossbeam assembly 101 connected to the support rod to the second portal leg 32;

[0118] Fix the third leg 33 at one end of the second lower crossbeam, and arrange the guy ropes around the third leg 33;

[0119] Connect one end of the second middle crossbeam assembly 102 to the support rod. After supporting by the support rod, connect the other end of the second middle crossbeam assembly 102 to the third leg 33;

[0120] After fixing the fourth leg 34 at the other end of the second lower crossbeam, connect the end of the second middle crossbeam assembly 102 connected to the support rod to the fourth leg 34;

[0121] Connect one end of the Bailey truss construction member to the first middle crossbeam assembly 101, and connect the other end of the Bailey truss construction member to the second middle crossbeam assembly 102 to form a stable framework.

[0122] Specifically, the steps of installing the leg structure include:

[0123] Use the crane 70 to vertically lift and erect the first leg 31, fix the bottom end of the first leg 31 on the first lower crossbeam 21 by bolts, and arrange the guy ropes around the first leg 31;

[0124] Lift and install the first middle crossbeam assembly 101. First, connect one end of the first middle crossbeam assembly 101 to the support rod. After supporting by the support rod, connect the other end of the first middle crossbeam assembly 101 to the first leg 31;

[0125] Use the crane 70 to lift and install the second leg 32. After adjusting and strengthening the second leg 32, connect the end of the first middle crossbeam assembly 101 connected to the support rod to the second leg 32;

[0126] Use the crane 70 to vertically lift and erect the third leg 33, fix the bottom end of the third leg 33 on the first lower crossbeam 21 by bolts, and arrange the guy ropes around the third leg 33;

[0127] Lift and install the second middle crossbeam assembly 102. Connect one end of the second middle crossbeam assembly 102 to the support rod. After supporting by the support rod, connect the other end of the second middle crossbeam assembly 102 to the third leg 33;

[0128] Use the crane 70 to fix the fourth leg 34 at the other end of the second lower crossbeam, and then connect the end of the second middle crossbeam assembly 102 connected to the support rod to the fourth leg 34;

[0129] Connect one end of the Bailey truss construction member 80 to the first middle crossbeam assembly 101, and connect the other end of the Bailey truss construction member 80 to the second middle crossbeam assembly 102 to form a stable frame.

[0130] In some alternative embodiments, the step of arranging the middle crossbeam structure between the portal leg structures includes:

[0131] Fix the first portal leg 31 at one end of the first lower crossbeam, and arrange guy ropes around the first portal leg 31;

[0132] Connect one end of the first middle crossbeam assembly 101 to the support rod, and after supporting by the support rod, connect the other end of the first middle crossbeam assembly 101 to the first portal leg 31;

[0133] After fixing the second portal leg 32 at the other end of the first lower crossbeam, connect the end of the first middle crossbeam assembly 101 connected to the support rod to the second portal leg 32;

[0134] Fix the third portal leg at one end of the second lower crossbeam, and arrange guy ropes around the third portal leg 33;

[0135] Connect one end of the second middle crossbeam assembly 102 to the support rod, and after supporting by the support rod, connect the other end of the second middle crossbeam assembly 102 to the third portal leg 33;

[0136] After fixing the fourth portal leg 34 at the other end of the second lower crossbeam, connect the end of the second middle crossbeam assembly 102 connected to the support rod to the fourth portal leg 34;

[0137] Connect one end of the Bailey truss construction member to the first middle crossbeam assembly, and connect the other end of the Bailey truss construction member to the second middle crossbeam assembly 102 to form a stable frame.

[0138] In some alternative embodiments, before installing the portal legs, first weld the Bailey truss to the lower crossbeam to reinforce the traveling mechanism. After the reinforcement is completed, use a truck crane for hoisting. Each time, hoist a single portal leg and connect it to the lower crossbeam. Weld a diagonal brace at the lower position of the middle crossbeam inside the portal leg to reinforce the connection with the lower crossbeam; the portal leg and the lower crossbeam are connected by bolts. Adjust the verticality of the centers of the two portal legs on one side, and after checking the data, hoist and connect the middle crossbeam to the portal leg, and use bolts to connect and fasten; after the hoisting and reinforcement of the portal legs are completed, check and adjust the elevation of the top flange surfaces of the four portal legs; before hoisting the portal legs, weld a temporary steel ladder to the top flange surface on the ground to facilitate the erection of the working platform, the adjustment measurement after the portal legs are in place, and the construction of the connection of the main beam.

[0139] In the first or second middle crossbeam assembly, in the vertical direction, it includes an upper middle crossbeam and a lower middle crossbeam. Use a 130-ton truck crane to erect a single portal leg on the right bank of the upstream side. After bolt fixation, arrange guy ropes, hoist the lower middle crossbeam in the first middle crossbeam assembly, and support it with a DN150 steel pipe at the left end of the crossbeam on the left bank. Hoist the portal leg on the left bank side and adjust and reinforce it. Then install the portal leg and crossbeam on the downstream side. Move the two-span Bailey truss construction member 80 of the lower crossbeam to the first middle crossbeam and temporarily weld and fix it to form a stable framework. Finally, hoist the upper middle crossbeam in the first or second middle crossbeam assembly. Measure the height from the upper flange surface of the portal leg to the working surface of the wheel, review the span and diagonal, and perform overall reinforcement after passing.

[0140] Specifically, the steps for installing the trolley travel mechanism include:

[0141] Measure and lay out the center points of the four driving wheel sets, and arrange the piers according to the center points;

[0142] Hoist the trolley travel mechanism to the position of the arranged piers

[0143] In some alternative embodiments, before installing the trolley travel mechanism, control points should be measured and laid out, and the two sets of bogies on the same lower crossbeam should be in the same cross-section; the trolley travel mechanism is divided into four sets of driving wheel sets, and the driving wheel sets and components such as reducers should be assembled before hoisting; after hoisting, adjust and reinforce the bogies; after all the driving wheel sets are completed, check and adjust the span, horizontal deviation of the wheels, vertical inclination of the wheels, and wheel co-position difference of each driving wheel set.

[0144] Specifically, the steps for installing the lower crossbeam structure include:

[0145] Use the crane 70 to hoist the first lower crossbeam 21, position it using the shear plate at the bottom of the first lower crossbeam 21, and connect the first lower crossbeam 21 to the trolley travel mechanism through bolts;

[0146] Use the crane 70 to hoist the second lower crossbeam 22, position it using the shear plate at the bottom of the second lower crossbeam 22, and connect the second lower crossbeam 22 to the trolley travel mechanism through bolts;

[0147] One end of the Bailey truss construction member 80 is welded and fixed to the first lower crossbeam 21, and the other end is welded and fixed to the second lower crossbeam 22.

[0148] In some alternative embodiments, a truck crane is used to hoist the lower crossbeam and connect it to the trolley traveling mechanism; check whether the flange center planes of the connections between the lower crossbeam and the portal legs are at the same elevation. After rechecking and passing, check the relative dimensions and diagonal dimensions between the two lower crossbeams. If the measured data is consistent with the dimensions given in the drawings, then connect the lower crossbeam and the trolley traveling mechanism. After the two lower crossbeams are connected to the traveling mechanism, the construction members 80 of the Bailey truss are used for reinforcement.

[0149] Specifically, the steps for installing the main beam structure and the end crossbeam assembly 50 include:

[0150] Position through the V-groove and weld the first main beam 41 to the top of the connection between the first portal leg 31 and the third portal leg 33;

[0151] Position through the V-groove and weld the second main beam 42 to the top of the connection between the second portal leg 32 and the fourth portal leg;

[0152] Use the crane 70 to hoist the end crossbeam assembly 50 and use a jack to finely adjust the position of the end crossbeam assembly 50.

[0153] Weld the first main beam to the top of the connection between the first portal leg and the third portal leg;

[0154] Weld the second main beam to the top of the connection between the second portal leg and the fourth portal leg;

[0155] Install the end crossbeam assembly between the first main beam and the second main beam.

[0156] Set the first end crossbeam at the top of the connection between the first portal leg and the second portal leg;

[0157] Set the second end crossbeam at the top of the connection between the third portal leg and the fourth portal leg;

[0158] Use the positioning groove to position the first end crossbeam and / or the second end crossbeam;

[0159] Use a jack to finely adjust the position of the first end crossbeam and / or the second end crossbeam.

[0160] Specifically, at the connection between each main beam and each portal leg, a plurality of positioning grooves are provided on the main beam. The positioning grooves can be V-grooves. The main beam and the portal leg are positioned using the V-grooves. However, in the actual installation process of the main beam, it is often restricted by the site, resulting in greater installation difficulty. Therefore, in this embodiment, the main beam is pre-assembled on the platform, lifted by two cranes in tandem, and then installed at the top of the portal leg.

[0161] In some optional embodiments, the main beams are connected on the ground using bolts. After the main beams are installed, the platform structure and electric hoist and its tracks are installed on the welded beams. The trolley 60 running tracks are installed on the top of the main beams on either side. After the main beams are hoisted, the trolley 60 running tracks on the other side are installed. After the main beams are hoisted, two truck cranes 70 are used to hoist the main beams, distributed on the upstream and downstream sides. The main beams are lifted and connected to the gantry legs at the same time. After positioning and fixing the welds, the end crossbeam assembly 50 is hoisted and connected to the main beams. After the main beams and end crossbeam assembly 50 are connected to form the gantry, the diagonals and various technical indicators are measured and adjusted. After the end crossbeam assembly 50 is completed, the gantry platform, driver's cab, and stairs are installed using a truck crane.

[0162] See also Figure 11 The present application provides a method for manufacturing a construction system for a dam top bidirectional gantry crane. Before the step of installing the trolley running mechanism, the construction method further includes:

[0163] Embedded parts of gantry crane tracks are embedded;

[0164] Door machine track installation.

[0165] In some optional embodiments, the gantry crane track is used by the trolley running mechanism to transport concrete to the site to be poured. The gantry crane track embedded part is used by the gantry crane track, and the gantry crane track is provided on the gantry crane track embedded part, and the gantry crane track embedded part is provided in the precast beam.

[0166] The embedded parts of the gantry crane track are embedded in advance. According to the progress of the gantry crane track beam concrete pouring, before the track beam is poured, the track embedded parts, the sliding contact wire duct embedded parts, the vehicle block embedded parts, etc. are buried according to the construction drawings. The installation height of the anchor bolts shall not be lower than the design elevation in the drawings.

[0167] For gantry crane track installation, QU120 steel rails are selected as the gantry crane track model. Before installing the gantry crane track, control points and lines are measured and laid out on the prefabricated beams to determine the values of the upstream and downstream gantry crane track centerline, span, installation elevation, etc., for reference and use during gantry crane track installation. The outer dimensions of the steel rails are inspected and installed after passing the inspection. Before hoisting the track, the track installation reference line is calibrated with steel wire. After inspection, the track is hoisted using a truck crane. After each section of track is installed, the horizontal position deviation between the actual track centerline and the installation reference line is re-measured to ensure that it does not exceed 2mm, and the track gauge deviation does not exceed ±3mm. After the track is installed, a point is measured at each end of each track to ensure that the height difference between the highest and lowest points of the track along the entire travel is no more than 10mm. After the re-measured data meets the track installation requirements and is confirmed to be correct, the track is fixed with bolts and pressure plates, and the tightening of each bolt is re-checked. The car stop is installed before hoisting the gantry crane to ensure that the car stop is in good contact with the buffer.

[0168] Please refer to Figure 11 , the present application provides a manufacturing method for a construction system of a two-way portal crane on the dam top. After the steps of installing the main beam structure and the end crossbeam assembly 50, the construction method further includes: hoisting the trolley 60 running mechanism onto the main beam; installing the trolley 60 lifting mechanism onto the main beam; installing accessories onto the two-way portal crane; installing electrical equipment onto the two-way portal crane; and winding steel wires on the trolley 60 lifting mechanism.

[0169] In some alternative embodiments, during the installation of the trolley 60 running mechanism, the trolley 60 running mechanism consists of a main trolley 60 and a secondary trolley 60. After the wheels of the main trolley 60 and the secondary trolley 60 are assembled with the frame, parameters such as the diagonal of the main trolley 60, the span of the trolley 60, the vertical and horizontal inclinations of the trolley 60 wheels, and the co-position difference between the driving wheel and the driven wheel are measured and corrected. After measuring and correcting that all parameters are qualified, use a truck crane to lift the walking mechanisms of the two trolleys 60 and the frame onto the main beam track.

[0170] During the installation of the trolley 60 lifting mechanism and other components, as Figure 9 , Figure 10 shown, the lifting mechanism consists of a driving device, a transmission device, a drum 92, a pulley block 93, a load-taking device, and a braking device. When installing the lifting mechanism, install components such as the drum 92, a reducer, a motor, a brake, a fixed pulley, etc. at the designated positions on the frame, and adjust the meshing of the open-type gears and the coaxiality of the couplings to meet the installation requirements. After the installation of the lifting mechanism is completed, install the maintenance single-girder frame and the electric hoist, and finally install the roof of the trolley 60.

[0171] During the installation of accessories, install accessories such as railings, car stops, and other auxiliary equipment according to the design drawings. For components that need to be welded, strictly control the welding quality. After welding, clean the welds, apply a primer anti-rust paint, and then apply a topcoat that is the same color as the original color.

[0172] Before installing the electrical equipment, check that the appearance of each power distribution cabinet and control panel cabinet is complete, without damage, deformation, rust, etc.; install and adjust motors of each mechanism, brake electromagnets, operating electrical cabinets, protection cabinets, control panels, overcurrent relays, and travel limit switch, emergency switch, various safety interlock switches, and fuses of each mechanism according to the drawing dimensions. The laying and wiring of each wire and cable are arranged neatly, and the wire ends are marked with obvious wiring numbers.

[0173] The wire rope winding includes the wire rope winding of the main and auxiliary lifting mechanisms. According to the wire rope winding direction marked on the design drawing, correctly wind the wire rope in the drum 92 group and the movable pulley block 93 (hook), and the end pressing plate of the wire rope is fixed firmly.

[0174] In some alternative embodiments, after the installation of the double-direction portal crane on the dam crest is completed, the portal crane can be subjected to no-load tests. During the no-load tests of the portal crane, the hoisting mechanism makes three round trips up and down respectively over the entire stroke to check whether the mechanical transmission part operates correctly.

[0175] In some alternative embodiments, after the installation of the double-direction portal crane on the dam crest is completed, the portal crane can be subjected to load tests, which specifically include static load tests and dynamic load tests.

[0176] Specifically, all mechanisms operate sensitively, work stably and reliably, the anti-climbing devices operate correctly and reliably, there are no cracks or other damages on each component part, and there is no looseness at each connection point; the traveling mechanisms of the gantry and the trolley 60 should travel smoothly, at a uniform speed, without obvious impacts and jerks, and the brakes should stop safely within the allowable braking stroke range after power-off; all limit switches, safety protection interlock devices and related electrical circuits work normally, and the operation is flexible and reliable.

[0177] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the embodiments of the present invention. Any equivalent structural transformation made by using the description and drawings of the embodiments of the present invention under the inventive concept of the embodiments of the present invention, or any direct / indirect application in other related technical fields is included in the patent protection scope of the embodiments of the present invention.

Claims

1. A construction system for a two-way portal crane on the dam crest, characterized in that, The construction system of the double-direction portal crane on the dam crest includes: The lower crossbeam structure, which includes the first lower crossbeam and the second lower crossbeam; The first lower crossbeam is arranged parallel to the extension line of the dam; The second lower crossbeam is arranged parallel to the extension line of the dam; The portal leg structure is arranged on the lower crossbeam structure. The portal leg structure includes the first portal leg, the second portal leg, the third portal leg and the fourth portal leg, and the shapes and masses of the first portal leg, the second portal leg, the third portal leg and the fourth portal leg are the same; The middle crossbeam structure, which includes the first middle crossbeam assembly and the second middle crossbeam assembly. The first middle crossbeam assembly is arranged between the first portal leg and the second portal leg, and the second middle crossbeam assembly is arranged between the third portal leg and the fourth portal leg; The Bailey truss construction member, one end of which is connected to the first middle crossbeam assembly and the other end is connected to the second middle crossbeam assembly. The Bailey truss construction member is composed of two-span Bailey truss construction members combined, and the two-span Bailey truss construction members are arranged in parallel; The main beam structure, which includes the first main beam and the second main beam. The first main beam is arranged at the top of the connection between the first portal leg and the third portal leg, and the second main beam is arranged at the top of the connection between the second portal leg and the fourth portal leg; A plurality of positioning grooves, each of which is respectively arranged at the connection of each main beam and each portal leg, and the positioning groove is a V-shaped groove; The support rod, one end of which is connected to the middle crossbeam assembly and the other end is connected to the ground or other fixed objects, so as to fix the middle crossbeam assembly when the portal leg structure and the middle crossbeam assembly are connected; The guy wire, which is used to fix the portal leg structure, and the guy wire is arranged around the portal leg.

2. The construction system of the double-direction portal crane on the dam crest according to claim 1, characterized in that The first middle crossbeam assembly includes at least two middle crossbeams; The second middle crossbeam assembly includes at least two middle crossbeams; One end of the first lower crossbeam is connected to the bottom of the first portal leg and the other end is connected to the bottom of the second portal leg; One end of the second lower crossbeam is connected to the bottom of the third portal leg and the other end is connected to the bottom of the fourth portal leg.

3. The construction system of the two-way portal crane on the dam crest according to claim 2, characterized in that, The construction system of the double-direction portal crane on the dam crest further includes: The trolley traveling mechanism, which includes the first driving wheel set, the second driving wheel set, the third driving wheel set and the fourth driving wheel set; One end of the first lower crossbeam is connected to the top of the first driving wheel set and the other end is connected to the top of the second driving wheel set; One end of the second lower crossbeam is connected to the top of the third driving wheel set and the other end is connected to the top of the fourth driving wheel set.

4. The construction system of the double-direction portal crane on the dam crest according to claim 1, characterized in that The construction system of the double-direction portal crane on the dam crest further includes: The end crossbeam assembly, one end of which is connected to the first main beam and the other end is connected to the second main beam; The end crossbeam assembly includes the first end crossbeam and the second end crossbeam. The first end crossbeam is arranged at the top of the connection between the first portal leg and the second portal leg, and the second end crossbeam is arranged at the top of the connection between the third portal leg and the fourth portal leg.

5. The construction system of the double-direction portal crane on the dam crest as described in any one of claims 1-4, wherein the shore on one side connected to the dam is the first side, and the shore on the other side is the second side. The first portal leg is arranged on the first side on the upstream side of the dam; The second portal leg is arranged on the second side on the upstream side of the dam; The third portal leg is arranged on the first side on the downstream side of the dam; The fourth portal leg is arranged on the second side on the downstream side of the dam.

6. A construction method for a two-way portal crane on the dam crest, characterized in that, When constructing using the construction system as described in any one of claims 1-5, the construction method includes: Installing the portal leg structure on the lower crossbeam structure, and arranging the middle crossbeam structure between the portal leg structures.

7. The construction method of the double-direction portal crane on the dam crest according to claim 6, characterized in that, The step of installing the portal leg structure on the lower crossbeam structure and arranging the middle crossbeam structure between the portal leg structures includes: Fixing the first portal leg at one end of the first lower crossbeam, and arranging guy ropes around the first portal leg; Connecting one end of the first middle crossbeam assembly to the support rod, and after being supported by the support rod, connecting the other end of the first middle crossbeam assembly to the first portal leg; After fixing the second portal leg at the other end of the first lower crossbeam, connecting the end of the first middle crossbeam assembly connected to the support rod to the second portal leg; Fixing the third portal leg at one end of the second lower crossbeam, and arranging guy ropes around the third portal leg; Connecting one end of the second middle crossbeam assembly to the support rod, and after being supported by the support rod, connecting the other end of the second middle crossbeam assembly to the third portal leg; After fixing the fourth portal leg at the other end of the second lower crossbeam, connecting the end of the second middle crossbeam assembly connected to the support rod to the fourth portal leg; Connecting one end of the Bailey truss construction member to the first middle crossbeam assembly, and connecting the other end of the Bailey truss construction member to the second middle crossbeam assembly to form a stable framework.

8. The construction method of the double-direction portal crane on the dam crest according to claim 6, characterized in that, Before the step of installing the portal leg structure on the lower crossbeam structure and arranging the middle crossbeam structure between the portal leg structures, the construction method includes: Measuring and laying out the center points of the four driving wheel sets, and installing the trolley traveling mechanism at the center points; Using the shear-resistant plate at the bottom of the first lower crossbeam for positioning, and connecting the first lower crossbeam to the trolley traveling mechanism; Using the shear-resistant plate at the bottom of the second lower crossbeam for positioning, and connecting the second lower crossbeam to the trolley traveling mechanism; Installing both ends of the Bailey truss members on the first lower crossbeam and the second lower crossbeam respectively for auxiliary fixation.

9. The construction method of the bidirectional portal crane on the dam crest according to claim 6, characterized in that, After the step of installing the portal leg structure on the lower crossbeam structure and arranging the middle crossbeam structure between the portal leg structures, the construction method includes: Welding the first main girder at the top of the connection between the first portal leg and the third portal leg; Welding the second main girder at the top of the connection between the second portal leg and the fourth portal leg; Installing the end crossbeam assembly between the first main girder and the second main girder.

10. The construction method of the double-direction portal crane on the dam crest as described in claim 9, wherein The step of installing the end crossbeam assembly between the first main beam and the second main beam includes: Setting the first end crossbeam at the top of the connection between the first portal leg and the second portal leg; Setting the second end crossbeam at the top of the connection between the third portal leg and the fourth portal leg; Positioning the first end crossbeam and / or the second end crossbeam by using the positioning groove; Fine-tuning the positions of the first end crossbeam and / or the second end crossbeam by using a jack.

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